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MARKET SHARE: The fraction of an industry's total sales accounted for by a single business. In general, market share is a "first-guess" indicator of a firm's market control. If, for example, a company has a market share of 100 percent (that is, a monopoly), then you can rest assured it has a substantial amount of market control. A company with a 25 percent market share has less, but still notable, market control. In fact, when you get right down to the bottom line, the phrase "market share" is only worth mentioning for oligopolistic firms with a significant degree of market control. There really is no market control for a monopolistically competitive firm with a 0.00000001 percent market share.

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TAXATION PRINCIPLES

Taxes are the mandatory payments made by members of society to governments to finance government operations. The study of public finance identifies several key principles of taxation -- tax effects (revenue and allocation), tax proportionality (proportional, progressive, and regressive), tax payments (benefit and ability-to-pay), tax equity (horizontal and vertical).

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Today, you are likely to spend a great deal of time touring the new suburban shopping complex trying to buy either a hepa filter for your furnace or a wall poster commemorating next Thursday. Be on the lookout for vindictive digital clocks with revenge on their minds.
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Helping spur the U.S. industrial revolution, Thomas Edison patented nearly 1300 inventions, 300 of which came out of his Menlo Park "invention factory" during a four-year period.
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